Cited by 99Adsorption and biosorption for pollutant removalEnvironmental remediation with nanomaterialsAdvanced oxidation water treatment

Influence of Adsorption Sites of Biochar on its Adsorption Performance for Sulfamethoxazole

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Li, Yinxue, Wang, Bin, Shang, Hongru, Cao, Yongna, Yang, Chunhui, Hu, Weijie, Feng, Yujie, Yu, Yanling·2023·Chemosphere

Abstract

In this study, the effects of various types of key adsorption sites on biochar were investigated on its adsorption capacity for sulfamethoxazole (SMX). The biochar obtained by carbonization of corncob at 800 °C (named CC800) was applied to the adsorption of SMX in aqueous environment. The adsorption of SMX by CC800 exhibited a "Three-stage downward adsorption ladder" characteristic in the whole pH range, which was attributed to the different mechanisms corresponding to different adsorption sites of CC800. The organic solvent method and heat treatment method restored the adsorption sites of CC800 after saturated adsorption. And the results revealed that the pore structure and aromatic structure under acidic conditions, and surface functional groups and pore structure under alkaline conditions were confirmed to be key SMX adsorption sites. The adsorption energies of each adsorption mechanism were calculated by density functional theory (DFT), and their order was (-)CAHB (-COO - ) > π + -π EDA interaction > (-)CAHB (-O - ) > pore filling mechanism > π-π EDA interaction. Based on the above studies, the adsorption performance of biochar to SMX can be improved by targeted modification of its micropore structure, surface functional groups, and aromatic structures.

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Crossref · 10.1016/j.chemosphere.2023.138408

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47 of 47 references verified0 citation errors · 0 not checkable

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  • The strong correlation between increased specific surface area and improved adsorption performance has been confirmed in several studies of thermally or chemically activated biochars.

    “The strong correlation between increased specific surface area and improved adsorption performance has been confirmed in several studies of thermally or chemically activated biochars [50][51][52].”

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Authors
Li, Y., Wang, B., Shang, H., Cao, Y., Yang, C., Hu, W., Feng, Y., & Yu, Y.
Affiliations
  • Harbin Institute of Technology (CN)
  • Southwest Jiaotong University (CN)
  • Guangdong University of Petrochemical Technology (CN)
  • State Key Laboratory of Urban Water Resources and Water Environment (CN)
Corresponding author
Yu, Yanling
Venue
Chemosphere
Publisher
Elsevier BV
Published
2023-06
Volume
326
Pages
138408
ISSN
0045-6535 (ISSN-L)
OpenAlex
W4324134700
Cited by
99
References
47
Citations by year
2026: 29 · 2025: 32 · 2024: 27 · 2023: 11
FWCI
5.10
Type
journal article
Language
en
Open access
Locations
  • Chemosphere (publishedVersion)
  • SSRN Electronic Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
Keywords
biochar, sulfamethoxazole, adsorption sites, corn cob biochar, pH effect on adsorption, surface functional groups, micropore structure, aromatic structure, pore-filling mechanism, adsorption energy, adsorption capacity, pharmaceutical removal from water, biochar modification
MeSH terms
Adsorption, Charcoal, Sulfamethoxazole, Water Pollutants, Chemical

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